Tennis racket
Abstract
Abstract THE INVENTION IN CERTAIN EMBODIMENTS PROVIDES A ONE PIECE TENNIS RACKET CAST IN A PERMANENT MOLD FORM NONFERROUS MATERIALS INCLUDING MAGNESIUM ALLOYS. THE FRAME OF THE RACKET IN ONE EMBODIMENT INCLUDES A HEAD PORTION HAVING RADIALLY DISPOSED HOLES CAST IN PLANAR ALIGNMENT WITH EACH OTHER AND COMMUNICATING WITH AN ANNULAR GROOVE INTO WHICH THE STRINGING OR NETTING US NESTED AND PROTECTED FROM DAMAGE. IN ANOTHER EMBODIMENT, THE HEAD PORTION INCLUDES A PLURALITY OF OPENINGS DISPOSED IN PARALLEL ALIGNMENT AND ARRANGED IN A PREDETERMINED CROSS-SECTIONAL CONFIGURATION SO AS TO PROVIDE CONTINUOUS CONTACT FOR THE STRINGING OR NETTING. THE FRAME ALSO INCLUDES A HANDLE PORTION WITH THE CENTER OR SHAFT REGION BEING FORMED INTO TWIN OR BIFURCATED ARMS WHICH DIVERGE IN A NECK PORTION ADJACENT TO THE HEAT PORTION. IN STILL ANOTHER EMBODIMENT THE UNIT IS FORGED FROM A NONFERROUS METAL, PREFERABLY ALUMINUM OR AN ALUMINUM ALLOY, WITH BRIDGING REINFORCING ELEMENT FOR ADDED-STRENGTH AND PROTECTION AGAINST ACOUSTIC FATIGUE.
Inventors
- 👤 Thomas P Galich
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |